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EP0496916A1 - Méthode pour le traitement de dépôts - Google Patents

Méthode pour le traitement de dépôts Download PDF

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Publication number
EP0496916A1
EP0496916A1 EP91101253A EP91101253A EP0496916A1 EP 0496916 A1 EP0496916 A1 EP 0496916A1 EP 91101253 A EP91101253 A EP 91101253A EP 91101253 A EP91101253 A EP 91101253A EP 0496916 A1 EP0496916 A1 EP 0496916A1
Authority
EP
European Patent Office
Prior art keywords
inorganic
stage
organic
components
upstream
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91101253A
Other languages
German (de)
English (en)
Other versions
EP0496916B1 (fr
Inventor
Heiner Dipl.-Ing. Dr. Kreyenberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT91101253T priority Critical patent/ATE106765T1/de
Priority to DE59101870T priority patent/DE59101870D1/de
Priority to EP91101253A priority patent/EP0496916B1/fr
Publication of EP0496916A1 publication Critical patent/EP0496916A1/fr
Application granted granted Critical
Publication of EP0496916B1 publication Critical patent/EP0496916B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0012—Settling tanks making use of filters, e.g. by floating layers of particulate material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/245—Discharge mechanisms for the sediments
    • B01D21/2461—Positive-displacement pumps; Screw feeders; Trough conveyors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
    • B01D21/262—Separation of sediment aided by centrifugal force or centripetal force by using a centrifuge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
    • C02F1/385—Treatment of water, waste water, or sewage by centrifugal separation by centrifuging suspensions

Definitions

  • the invention relates to a device for processing deposits, in particular sediments and, in particular, sediments during dredging of water, contaminated material or the like, in which the material to be treated with its inorganic (stones, gravel, sand etc.) and organic (wood , Roots, etc.) components in successive stages and, if necessary, pollutants are cleaned, first in a first stage, preferably using a classifier, the components above a certain size are separated out according to inorganic and organic components, then in a second Stage the inorganic constituents contained in an inorganic and organic slurry are dewatered and finally in a third stage, preferably by means of a centrifuge, dewatered the inorganic and organic slurry of the remaining constituents and thereby the won thick sludge and the waste water can be processed or discharged.
  • inorganic stones, gravel, sand etc.
  • organic wood , Roots, etc.
  • a particular field of application of the invention is the treatment of sediments that arise when dredging water and soil, for example from inland lakes, rivers, waterways (canals) etc.
  • Another field of application of the invention is the treatment of contaminated material.
  • the scope of the invention is not limited to the preparation of such materials. Rather, the treatment of deposits is understood to mean all material which can be subjected to the process according to the invention in order to achieve the same effects with them as are achieved, for example, in the sediments obtained during dredging of water.
  • the deposits according to the invention are to be understood as materials which are to be processed further after processing and which are composed of very fine, fine and coarse goods.
  • the process for processing deposits in the form of sediments of the type specified at the outset when sludge is removed from water is known from EP-PS 0 282 621.
  • the material to be treated is separated from one another in successive stages and, in particular, is cleaned of pollutants, so that the fractions obtained therefrom can be recycled.
  • the components above a certain size are separated from the sludge according to inorganic and organic components using a classifier.
  • the inorganic constituents contained in an inorganic and organic turbidity are dewatered by means of a cyclone system and by means of a heavy sludge sorter as well as a downstream vibrating dewaterer, and finally in a third stage the inorganic and organic turbidity of the remaining constituents are added using a centrifuge dewater to get thick sludge.
  • this second stage consumes a great deal of energy and ultimately requires increased operating effort, since the upstream technology with the upstream sorter requires constant observation, since otherwise there is a risk of deposits on the floor resulting from insufficient upstream water and pressure lead to no reasonable flow and thus no longer clean sand cleaning.
  • the object of the invention is to create an improved processing device for deposits, the throughput in particular being to be increased while saving energy in the second stage.
  • the invention proposes that a dewatering screw is provided for the second stage.
  • a treatment device designed for this technical teaching for deposits and, in particular, for sediments during dredging of water has the advantage that a very high throughput can be achieved in the overall system by using a dewatering screw in the second stage.
  • a dewatering screw instead of a multi-cyclone system with a downstream upflow classifier, a substantial saving in energy is also achieved.
  • a low procedural effort in the form of a lower operating effort is required, since a dewatering screw can simply be run without requiring special guarding, in contrast to an upstream sorter.
  • the invention is thus distinguished Processing device due to its low investment and operating costs and represents an inexpensive way of processing deposits, in particular sediments during dredging. Due to the resulting compression of the material, the water contained therein is squeezed out, similar to the way a sponge is squeezed out, thus achieving dewatering.
  • the dewatering screw be preceded by an in particular two-lane vibration classifier of the first stage.
  • One lane of this vibration classifier classifies the mineral gravel and sand, while a second lane is responsible for the organic parts, plastic parts, etc.
  • This upstream vibration classifier is particularly useful when a drainage container is provided.
  • the vibration classifier in addition to the drainage screw, be followed by the drainage container already mentioned, in particular for the coarse organic components.
  • a drainage container is a container for the raw materials that are retained in the container, the sludge being drawn off through laterally arranged gaps, slots or sieves. After the filling process, the drainage container can then be moved away and the substances contained in it can be disposed of or further processed.
  • the drainage screw for the inorganic and organic turbidity is a thickener, in particular a compression thickener or lamella clarifier of the third stage.
  • the dewatering screw in the lower area be equipped with an upstream sorting device for the material to be dewatered.
  • the upflow generated by the upstream sorting device flushes out the turbidity at the top and the fine organic and fine mineral particles are washed out as in an upstream sorting unit.
  • the parts therefore flow as inorganic and organic slurry over the water tank, while the washed sand is discharged via the screw of the dewatering screw depending on the upstream speed.
  • Equipping the dewatering screw with an upstream sorting device is an independent invention, regardless of the fact that it is integrated in a very special system in the exemplary embodiment shown.
  • upstream sorting device has upwardly directed upstream nozzles. Water is pumped through these upflow nozzles, which generate the upward flow. This represents a technically simple possibility of realizing an upstream sorting device.
  • the upstream nozzles are preferably arranged in the lower region of the dewatering screw.
  • the system initially consists of a removal device 1 for the sludge, for example in the form of a cutting head suction excavator.
  • This removal device 1 is equipped with a stone catcher basket 2, which has a mesh size of 100 mm, for example, and thus captures larger components than 100 mm.
  • the sediment suspension is fed to a first separation stage consisting of sieve cyclone 4, a washing drum 5 and an oscillation classifier 6 with the interposition of a volume controller 3 for the system feed.
  • a first separation stage the inorganic and organic coarse components above a size of, for example, 6 mm are separated from the fine components below 6 mm.
  • the sieve cyclone 4 there is a water pre-separation and pre-screening of the coarse components above 6 mm, so that the pre-separated water with fine components below 6 mm (fine sludge) is removed in a line 7 and fed to the vibration classifier 6.
  • the pre-dewatered solid suspension in the sieve cyclone 4 with the coarse constituents is fed via a line 8 to the washing drum 5, which is provided with baffles. These cause the coarse organic components (wood, roots etc.) to be separated from the coarse inorganic components (Stones, gravel, sand etc.), the discharge from the washing drum 5 taking place separately via line 9 (organic constituents) and line 10 (inorganic constituents).
  • line 9 organic constituents
  • line 10 inorganic constituents
  • the vibration classifier 6 consists of two tracks, namely a first track for the mineral gravel and a second track for the organic parts, plastic parts and everything else that arises apart from the mineral gravel.
  • the coarse components are guided back and forth several times on the tracks of the vibration classifier 6 and cleaned of fine organic and mineral particles. This applies in particular to the coarse organic constituents in order to wash out these fine particles that may be contaminated with heavy metals.
  • the organic components cleaned in this way are fed from their corresponding path of the vibration classifier 6 to a drainage container 11.
  • This drainage container 11 is provided with laterally arranged columns, sieves or slots through which the inorganic and organic slurry can be drawn off.
  • the organic constituents remain, whereby the wood and roots contained therein can be used, for example, for combustion for energy generation or composting.
  • the second path of the vibrating classifier 6 with the mineral gravel is followed by a drainage screw 12, wherein an atrition 13 can be interposed in the line between the vibrating classifier 6 and this drainage screw 12.
  • the drainage check 12 is shown in greater detail in FIGS. 2 and 3. It essentially consists of an ascending channel 14, which is provided in the lower area with an inlet 15 for the material originating from the vibration classifier 6.
  • a worm 16 is rotatably mounted within the channel 14 and is driven by a corresponding motor.
  • the material fed into the inlet 15 collects in the lower region of the channel 14.
  • the solids are pushed upwards by means of the screw 16 and compressed in such a way that the water is pressed out.
  • the solid material dewatered in this way passes through a discharge 17 of the dewatering screw 12 to a gravel store 18, as is indicated in FIG. 1.
  • the inorganic and organic slurry flows over an overflow channel 19 in the lower area of the channel 14 and is - as will be described in more detail below - further treated in the system.
  • the dewatering screw 12 has an upstream sorting device 20 in the lower region of the channel 14. This consists constructively of upflow nozzles 20 ', which are arranged on the underside of the channel 14 and can be acted upon with water in such a way that an upward flow is generated within the channel 14, which flushes out the turbidity and thereby the fine organic and fine mineral particles such as be washed out with an upstream classifier.
  • the inorganic and organic slurry from the overflow channel 19 of the dewatering screw 12 is fed by means of a feed pump 21 to a thickener 22, which is a compression thickener in the exemplary embodiment shown. After the mineral and organic slurry has run in, it spreads out in the thickener 22.
  • the light organic components collect, which are fed via a line 24 to a reservoir 25 with a homogenizer 26 will.
  • the solid particles are separated from the suspension originating from the thickener 22 in order to obtain mechanically pre-dewatered sands and silt with a particle size greater than 0.03 mm.
  • the sands and silt are fed via a line 29 to a conveyor belt 30 and given to a truck 31 and fed to landfill, composting, incineration or the like.
  • the slurry with components smaller than 0.03 mm from the hydrocyclone 28 is fed to the reservoir 25 via a line 32.
  • the slurry is transported further by means of a feed pump 33 to a dewatering machine in the form of a centrifuge 34, which forms the third separation stage after the cyclone system 14 as the second separation stage.
  • a precipitation station 36 is connected which is to precipitate the phosphates dissolved in the water by adding Fe (II) sulfate or Fe (III) chloride sulfate and convert them into sedimentable solids.
  • a neutralization station 37 is connected in the line 35 between the reservoir 25 and the centrifuge 34, which is intended to deacidify and thus neutralize the water by adding, for example, lime milk, and at the same time to provide sedimentation aid. Here, too, it precipitates into a sedimentable solid.
  • the mineral and organic sludge and the precipitates from the stations 28 and 29 are dewatered.
  • the thick sludge obtained is fed, for example, to the truck 31 via the conveyor belt 30 and, corresponding to the sludge and the silt from the hydrocyclone 28, is landfilled, composted , Combustion or the like.
  • the drain water (centrate) from the centrifuge 34 is finally fed to a lamella clarifier 38 via line 39, which is preceded by a flocculator 40.
  • a counter-flocculation station 41 is also connected in line 39.
  • the sludge concentrate 42 obtained in the lamella clarifier 38 is returned to the centrifuge 34 via a line 43 of the line 35, so that the sludge concentrate can again pass through the third stage and can be separated off as a centrifugate by means of the centrifuge.
  • the discharge water from the lamella clarifier 38 is passed into a receiving trench 45 after passing a filter 44, which can have an oil barrier 46. From there, the waste water is returned to the water.
  • the filter 44 is intended to rid the drain water of sulfur particles and floating materials, whereby sand filters and solid-state filters can be used. This significantly reduces the chemical oxygen demand (COD).
  • the system described can be stationary. But it can also be mobile, ie it can be transported to its respective location.
  • the system can be a single compact device that contains all the elements.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Soil Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Detergent Compositions (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
EP91101253A 1991-01-31 1991-01-31 Méthode pour le traitement de dépôts Expired - Lifetime EP0496916B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT91101253T ATE106765T1 (de) 1991-01-31 1991-01-31 Verfahren zum aufbereiten von ablagerungen.
DE59101870T DE59101870D1 (de) 1991-01-31 1991-01-31 Verfahren zum Aufbereiten von Ablagerungen.
EP91101253A EP0496916B1 (fr) 1991-01-31 1991-01-31 Méthode pour le traitement de dépôts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91101253A EP0496916B1 (fr) 1991-01-31 1991-01-31 Méthode pour le traitement de dépôts

Publications (2)

Publication Number Publication Date
EP0496916A1 true EP0496916A1 (fr) 1992-08-05
EP0496916B1 EP0496916B1 (fr) 1994-06-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101253A Expired - Lifetime EP0496916B1 (fr) 1991-01-31 1991-01-31 Méthode pour le traitement de dépôts

Country Status (3)

Country Link
EP (1) EP0496916B1 (fr)
AT (1) ATE106765T1 (fr)
DE (1) DE59101870D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002009881A1 (fr) * 2000-08-01 2002-02-07 Boris Pavlovich Derkachev Procede de triage hydraulique de matieres a fractions fines
CN106396168A (zh) * 2016-08-31 2017-02-15 甘肃金润玉石业有限公司 一种大理石废水加工处理系统
CN113998853A (zh) * 2021-11-24 2022-02-01 北京北排装备产业有限公司 一种排水沉泥定向多级分离系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2077817A1 (en) * 1970-02-04 1971-11-05 Carrillo Alvarez Jose Extraction of water - for small-grain materials
FR2218925A2 (fr) * 1973-02-16 1974-09-20 Black Clawson Fibreclaim Inc
EP0282621A1 (fr) * 1987-03-19 1988-09-21 Heiner Dipl.-Ing. Dr. Kreyenberg Méthode et dispositif pour l'enlèvement des boues provenant des eaux
EP0325159A2 (fr) * 1988-01-16 1989-07-26 G E S U Gesellschaft Für Saubere Umwelt Mbh Procédé et dispositif de nettoyage continu de terres contaminées
DE3908185A1 (de) * 1989-03-14 1990-09-20 Umwelt Gmbh Ab Verfahren und vorrichtung zur aufbereitung kontaminierter bodenmaterialien

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2077817A1 (en) * 1970-02-04 1971-11-05 Carrillo Alvarez Jose Extraction of water - for small-grain materials
FR2218925A2 (fr) * 1973-02-16 1974-09-20 Black Clawson Fibreclaim Inc
EP0282621A1 (fr) * 1987-03-19 1988-09-21 Heiner Dipl.-Ing. Dr. Kreyenberg Méthode et dispositif pour l'enlèvement des boues provenant des eaux
EP0325159A2 (fr) * 1988-01-16 1989-07-26 G E S U Gesellschaft Für Saubere Umwelt Mbh Procédé et dispositif de nettoyage continu de terres contaminées
DE3908185A1 (de) * 1989-03-14 1990-09-20 Umwelt Gmbh Ab Verfahren und vorrichtung zur aufbereitung kontaminierter bodenmaterialien

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002009881A1 (fr) * 2000-08-01 2002-02-07 Boris Pavlovich Derkachev Procede de triage hydraulique de matieres a fractions fines
CN106396168A (zh) * 2016-08-31 2017-02-15 甘肃金润玉石业有限公司 一种大理石废水加工处理系统
CN113998853A (zh) * 2021-11-24 2022-02-01 北京北排装备产业有限公司 一种排水沉泥定向多级分离系统

Also Published As

Publication number Publication date
DE59101870D1 (de) 1994-07-14
ATE106765T1 (de) 1994-06-15
EP0496916B1 (fr) 1994-06-08

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